Stopcock or valve



May 28, 1929. j c 1,715,168

STOP COCK OR VALVE Filed March 5, 1927 4 v '1 ENTOR 5M 2 1; BY

' A TTORNE x;

Patented M 2 1 UITEE'.

EARL MCGEE, OF CATONSVILLE, MARYLAND, ASSIGNOR TO STANDARD GAS MENTCORPORATION, A CORPORATION OF MARYLAND.

FFICE scrorooox on VALVE.

Application filed March 5, 1927". Serial No. 173,007.

This invention relates to improvements in rotary plug valves, and isdirected particularly to such valves, also known as stop cocks, for usewith gas burners, in gas ranges and other environments.

It is desirable to limit the movements of valve plugs in valves of theabove mentioned character, and this has usually been accomplished byproviding the plugs with radial pins adapted to abut fixed stopshoulders on the valve bodies. Such arrangements have given rise toobjections inthat the pins become loose and drop out or become shearedoff, leaving the device without stop means. The fixed stop shouldershave usually been provided by slots or notches in the casing walls,exposing the pins, and dirt settling on and adjacent to'the stopshoulders and pins has tended to interfere with the proper operation ofthe valves and rendered them un 'sightly in appearance. Furthermore, itis necessary to provide such valves in right hand and left hand form,and in order to do this either the valve bodies or the valve plugs mustbe made in rights and lofts, thereby increasing manufacturing costs.

' plates a valve body or casing having a tapered The present inventionovercomes the objectionable features of the prior'art byproviding a plugvalve or stop cock with improved means for limiting the movement of theplug, and in which the stop means are reversible, whereby the parts maybe assembled to formeither a right hand or .a left hand valve.

More specifically the invention contemvalve seat,'and a valve plugrotatable therein, said casing and plug being provided with mutuallyengaging stop members having extended complementary bearing surfaces Thecasing is formed with a counterbore which is eccentrically disposed withreference to the tapered valve seat and preferably at the small endthereof, portions of the counterbore walls forming the fixed stops, andthe valve plug carries a detachable washer which is in the counterboreand adapted to abut against said fixed stops to limit rotation of thelug. In one form ofthe invention the counter- V bore is definedbysubstantially merged curved walls of dilferent radii so proportioned asto permit movement of the valve plug and stop washer through an ,arc .ofninety degrees, and the edges of the stop washer are similar- 1 cured inis ri te the siren incident I applied to a gas burner;

to the abutment of the bearing surfaces. In two of the modificationsillustrated, the bearing surfaces are relatively fiat, and in each of.the forms, the stop washer and the plug are held in theiroperativepositions by a compression spring of the usual form. Bylnverting the stop washer with reference to the valve plug, the devicemay be changed from right hand to left hand, or vice versa, and theconstruction is so simple that it is well adapted for economicalmanufacture.

These and other features and advantages will be apparent from thefollowing description, reference being had to the accompanying drawingswherein the inventionhas been shown by way of illustration, andwherein 1Figure 1 is an edge view, partly in section, of a stop cock embodyingthe invention and Fig. 2 is a transverse sectional view on line 2-2 ofFig. 1;

Fig. 3 is a transverse sectional view on line 3-3 of Fig. 1 showing thevalve opened;

Fig. 4 is a view similar'to Fig. 3 withthe parts inclosed position;

Figs. 5 and 6 are views similar to Fig. 3, and each showing a modifiedform of the 'invention. I l I Referring to Figures 1 to 4 inclusive, it,will be seen that the improved'valve illus-' trated is agas cock and isshown in association with portions of a gas range, having the usual top10, below which is the mixing tube 11 leading inwardly to a burner notshown. The outer end of the tube 11 is fitted with a usual primary airvalve 12 and is suppliedlwith gas through the improved valve 13 from agas supply pipe or' manifold 14. r l

The valve 13 comprises a casing 15 having at one side a-threadedextension 16 for con nection with the manifold 14, andjat its oppositeside a threaded extension or boss 17 to which is secured a nozzle 18.Extending longitudinally through the casing 15an d ex EQUIP- tensions 16and 17 is a bore l9 constituting a fluid passage, and extending,downwardly through the casing,intersecting the bore 19,

is a tapered valve seat 20. The casing 15 is further characterized-by acounterbore 21 which surrounds the small end of the tapered by acontinuous and imperforate wall porti n 22- The i n u a e. f the e te15, it having a tapered barrel portion seated snugly in the taperedvalve seat 20, and through wlnch 1s a transverse port 26 adaptedto beselectively moved into or .out. of: registration with the bore 19 byrotation of the valve plug. The upper end of the plug is provided with ahandle 27 of any ordinary on preferredform, by which the valve may beopened or closed, and the lower end of the plug-has a flattened portion28 which extends though the counterbore and beyond the easing. Theextremity of the portion 28 is screw threaded as at 29 for theaccommodation of an adjusting nut 30 and a lock nut 31, and confinedbetween the nut 30 and the lower end of the casing 15 is a compressionspring 32, theinner orupper end of which bears against a thrust Washer33.. From this it will be evident-that the spring 32 maintains the valveplug inits seat so that it may be rotated without possibilityotlea-lzage.

In order to limit the rotation of the valve plug, a; stop washer 34 isassociated therewith,

said stop washerbeing disposed within the counterbore- 21 and preferablyconcealed by the thrust washer 33. As best shown in Figs. 3- and, 4%,.the stop washer 34; is non-circular in 4 outline, and is, in effect, aradial extension of the valve plug, it being rotatable therewith byvirtue of the flattened portion 28 extending through. a substantiallyrectangular aperture 35 in the stopwasher. The opposite side "edges3.6;and37 oi the stop washer are curved in such a manner as to becomplementary to the fixed stops 23, and the proportions of the partsare such that the stop washer permits movement ofthe'valve plug throughan arc of ninety degrees, from the open position as shown in: Fig. 3 tothe closed position in Fig. 4.. The. relatively long mutually engagingsurfaces 23, 36, and distribute the shocks,

incident to the movement or" the valve plug,

. overa. substantial area, rendering the device exceptionally strong anddurable, and there is nopla'ce for dirt tosettle in such a manner 34..For example, the valveshown in Fig. 3

may be changed to. the opposite hand by removing the nuts 30 and 31,spring 32 and thrust. washer 33', and then inverting the stop washerwithreference to the valve plug. Said parts30, 31,. 32, and 33-may thenbe applied again, rendering the valve ready for use in such condition.

The valve shown in Fig. 5 is of the same general construction as thepreviously described embodiment, but has a diiierently shapedcounterbore 21" and stop Washer 34. Here the fixed stop portions 23'ofthe casing are straight and diverging tangentially from an arcuateportion 40, and the side edges 36 and 37 of the stop washer aresimilarly straight, but converging in a direction away from the axis ofthe valve plug.

In Fig. 6. a further modification isshown, wherein the fixed stopportions 23" ofthe counterbore 21 arev perpendicular to each. other, andas a consequence, they are not aslong as those of the previous'forms;The; side edges 36* and: 3'? of the stop washer 34 are parallel to eachother, and the illustratedarrangement issuch that the stop washer 34 isnot reversible.

From the foregoing it will be evident. that a so-called pinless cock:hasbeen produced, the

construction being extremely simple, yet strong and dependable.Obviously,.the-. invention is susceptible-of further modifications inthe details of construction and arrange; ment of parts-, and the rightis herein reserved tov make such changes as fall. within the. scope ofthe appended claims without departing from the. spirit of the invention.

Having thus described my invention,, what Iclaim is:' I 1-. A valve ofthe class described, comprise ing a valve casing having a tapered. valveseat,.and provided with an eccentnically d-is-.

posedcounterbore surrounding the small end. of the tapered valve seat,said. counterbore being; defined by a continuous wall portion integralwith the casing and having substantially merged curves 0t differentradii a tapered valve plug rotatabl e in said. valve, seat, an aperturedstop washer detachably-associated with the valve plug and disposed. in.saidv counterbore, said stop washer having extended edge portions withmerged curves complementary to portions of said counterbore wall. andadapted to abutagainstthe.

same to limit the rotation ofthe'plug, and a compression spring formaintaining the. plug. and the stop washer in operative positions. inthe casing. I I

2. A valve of the class described,compris-- ing a valve casing having atapered valve seat, and provided with an eccentrically disposedcounterbore surrounding. the smalli'end of the tapered valve seat, saidcounterbore being defined by a continuous wall portion integral with thecasing and havingsubstantially merged curves of different radii, a ta-'pered valve plug-rotatable in said valve seat andhaving a flattenedportion extending thru and'beyond the counterbore, st'opwasher de-'tachably mounted on said flattened portion of the valve plug forrotation therewith in the counterbore, said stop'washer having extendededge portions with merged curves tened portion between the nut and thestop 7 complementary to portions of said counterwasher whereby to holdthe plug in its seat bore wall and adapted to abut against the and thestop washer in the counterbore. 1

same to limit the rotation of the plug, a nut In testimony whereof, Ihave aifixed my 5 threaded on the outer projecting end of the signaturehereto.

flattened portion of the rotatable valve plug,

and a compression spring encircling said flat- EARL MOGE-E.

